基于ADSP-BF533的VGA显示控制器设计

Design of the VGA Display Controller Based on ADSP-BF533

利用ADSP-BF533及其外围电路实现了它与VGA的通信,可以将转化为数字信号的图像,通过VGA接口显示在CRT显示屏上。ADSP-BF533中主要采用TIMER和PPI接口。TIMER接口产生行同步和场同步信号,这两个信号的时序配置尤为重要,而TIMER接口在脉宽调制模式下,经过简单的配置就可以输出场同步信号和行同步信号。PPI接口主要是将图像转化成三原色信号进行输出。这两个口输出的数字信号再经过D/A转换就可以接到VGA接口上,经过验证,最终可将图像正确地显示在显示屏上。

This paper take advantage of ADSP-BF533 and its circuit to communicate with VGA , the image which is changed into digital signal can be displayed on CRT screen through VGA interface . TIMER interface and PPI interface play the most important role in the DSP. TIMER interface can be configured to generate row synchroni-zing signal and file synchronizing signal . Weather the two signals are correct is very critical , The TIMER interface in the pulse with modulation mode can generate row synchronizing signal and file synchronizing signal after a simply configuration . The three primary color signals which the image converts into are output through PPI interface. The digital signals which are output through the two interfaces can be connected to VGA after D/A converting. The test shows that the image can be displayed on the screen.